Eyeglass device

ABSTRACT

Eyeglasses comprise a pair of spectacles having primary lenses and an auxiliary lens assembly attached to the spectacles. The auxiliary lens assembly is secured by a subframe that includes at least one arm having a magnet at one end to co-operate with a magnet provided on the spectacles. A hinge is provided on the subframe at the opposite end of the arm to allow the auxiliary lens assembly to move from a position in which the primary lenses are covered to a position in which they are exposed.

[0001] This application is a continuation in part of U.S. application Ser. No. 10/394,651 which claims priority from U.S. Provisional Application No. 60/366,247 filed on Mar. 22, 2002.

FIELD OF THE INVENTION

[0002] The present invention relates to eyeglasses and to auxiliary lens assemblies for use with such eyeglasses.

[0003] The use of spectacles to correct deficiencies in vision is well known. Similarly, it is well known to use auxiliary lenses with spectacles to meet certain conditions, such as extreme brightness caused by the sun. Auxiliary lenses have traditionally been secured to the spectacles by mechanical clips that engage the frame of the spectacles. More recently, as shown in U.S. Pat. No. 5,568,207, magnets have been utilised to retain the auxiliary lens assembly on the spectacle frame. Such an arrangement has made the placement or removal of such lenses more convenient then with the mechanical clips.

[0004] In some situations, such as when driving through alternate bright and dark areas, it is not convenient to fit and remove the auxiliary lens assembly with each changing condition. One prior art solution is shown is U.S. Pat. No. 3,531,188 to Leblanc in which an auxiliary lens assembly is secured by clips to the spectacle with a hinge to permit the auxiliary lens assembly to be moved between a covered and uncovered position of the primary lens. In the Leblanc patent, the auxiliary lens assembly is secured by clips that not only are difficult to assemble but also suffer the risk of damaging the surface of the primary lens. Moreover, with the auxiliary lens assembly in a position to uncover the primary lens, the retaining clips are visible and therefore unattractive.

[0005] It is therefore an object to the present invention to provide an auxiliary lens assembly and eyeglasses incorporating such as assembly obviates or mitigates the above disadvantages.

[0006] In general terms, the present invention provides an auxiliary lens assembly for use with a pair of spectacles having a pair of primary lenses. The assembly has a pair of auxiliary lenses interconnected to one another by a bridge and a pair of arms, each associated with a respective arm of the lenses. Each of the arms is connected at one end to the auxiliary lens and has a magnetic member at an opposite end for connection to a magnetic member on the spectacle and thereby locate the assembly on the spectacles. Each of the arms includes a hinge to permit movement of the assembly between a first position in which the auxiliary lenses cover the primary lenses to a second position in which they do not cover the primary lenses.

[0007] In an alternative aspect, the present invention provides eyeglasses comprising a pair of spectacles having a pair of primary lenses interconnected by a bridge and a pair of temples pivotally connected to the primary lenses for retaining the spectacles on a user. A first magnetic member is located on the spectacles. An auxiliary lens assembly has a pair of auxiliary lenses interconnected to one another by a bridge. A second magnetic member is secured to the auxiliary lens assembly and positioned to co-operate with the first magnetic member to retain the auxiliary lens assembly on the spectacles. A hinge between the spectacles and the auxiliary lens assembly permits the auxiliary lens assembly to move whilst secured to the spectacles between a first position in which the primary lenses are covered by said auxiliary lenses and a second position in which said auxiliary lenses do not cover said primary lenses.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Embodiments of the invention will now be described by way of example only with reference to the accompanying drawings in which:

[0009]FIG. 1 is a front elevation of a pair of spectacles.

[0010]FIG. 2 is a front elevation of an auxiliary lens assembly.

[0011]FIG. 3 is a plan view of the spectacle shown in FIG. 1.

[0012]FIG. 4 is a plan view of the auxiliary lens assembly shown in FIG. 2.

[0013]FIG. 5 is a front elevation of the eyeglasses formed from a combination of the spectacles of FIG. 1 and the auxiliary lens assembly of FIG. 2.

[0014]FIG. 6 is a plan view of FIG. 5.

[0015]FIG. 7 is a view on the line 77 of Figure on a larger scale.

[0016]FIG. 8 is a view similar to FIG. 7 partly in section.

[0017]FIG. 9 is a detailed view of a first alternative embodiment to the arrangement shown in FIG. 7.

[0018]FIG. 10 is a view similar to FIG. 9 of a second alternative embodiment to that shown in FIG. 7.

[0019]FIG. 11 is a side view similar to FIG. 7 of an alternative configuration.

[0020]FIG. 12 is a view similar to FIG. 7 of a further alternative configuration.

[0021]FIG. 13 is a perspective view of a further embodiment.

[0022]FIG. 14 is an enlarged view of a portion of the embodiment of FIG. 13.

[0023]FIG. 15 is a view on the line XV-XV of FIG. 14.

[0024]FIG. 16 is a view similar to FIG. 14 of an alternative embodiment.

[0025]FIG. 17 is a view on the line XVII-XVII of FIG. 16.

[0026]FIG. 18 is a view similar to FIG. 16 of a still further embodiment.

[0027]FIG. 19 is a view on the line 19-19 of FIG. 18.

[0028]FIG. 20 is a view similar to FIG. 18 of a still further embodiment.

[0029]FIG. 21 is a view on the line 21-21 of FIG. 20.

[0030]FIG. 22 is a view similar to FIG. 20 on a yet further embodiment.

[0031]FIG. 23 is a view on the line 23-23 of FIG. 22.

[0032]FIG. 24 is a view similar to FIG. 22 of a further embodiment.

[0033]FIG. 25 is a view on the line 25-25 of FIG. 24.

[0034]FIG. 26 is a view similar to FIG. 24 of a further embodiment,

[0035]FIG. 27 is a view on the line 27-27.

[0036]FIG. 28 is a front perspective view of a further embodiment.

[0037]FIG. 29 is an enlarged view of a portion of the embodiment of FIG. 28, showing one form of connection.

[0038]FIG. 30 is a view similar to FIG. 29 showing an alternate form of connection.

[0039]FIG. 31 is a perspective view of a further embodiment of eyeglass.

[0040]FIG. 32 is an enlarged view of a portion of FIG. 31 showing one form of connection.

[0041]FIG. 33 is a view similar to FIG. 32 of an alternative form of connection.

[0042]FIG. 34 is a view on the line 34-34 of FIG. 31.

[0043] Referring therefore to FIG. 1, a pair of spectacles 10 includes a pair of primary lenses located within a frame 16. The frame 16 includes a pair of lens rims 18 interconnected by a bridge 20. The frame 16 also includes hinge pedestals 22 that are connected to temples 24 by a hinge pin 26. The temples 24 extend rewardly along the sides of the users head and secure the spectacles in a well known manner.

[0044] A pair of housings 28 are provided on the frame 16 adjacent to the temples 24. As shown in FIG. 3, the housings 28 are located behind the pedestals 22 so as not to be seen from the front. The housing 28 is shown in greater detail in FIG. 7 and includes an annular collar 30 that encompasses a magnet 32. The magnet 32 has one of its surfaces 34 exposed and a flange 36 on the collar 30 extends about the periphery of the magnet 32.

[0045] An auxiliary lens assembly 40 similarly comprises a pair of auxiliary lenses 42, 44 contained within a frame 46. The frame 46 includes a pair of wings 48 that project upwardly in the temple regions of the frames 46. A pair of arms 50 are secured to the wings 48 and extend rewardly from the frame 46. As again, can be best seen in FIG. 7, each of the arms 50 extends from the wing 48 to the housing 28 and has an elbow indicated at 52 intermediate its ends. The distal end of the arm 50 remote from the wing 48 has a housing 54 with a recess 56 to accommodate a second magnet 58. A lower face 60 of the housing 54 abuts the flange 36 when the magnets 58, 32 are in engagement.

[0046] The arm 50 is secured to the wing 48 through a hinge 62 shown in FIG. 8. The hinge 62 includes a slot 64 formed at one end of the arm 50. A hinge body 66 formed at the end of the wing 48 is located in the slot 64 and secured for pivotal movement by a hinge pin 68. The hinge body 66 has a pair of recesses 70, 72 that is shaped to receive the curved end of a pin 74. The pin 74 is slidable in a bore 76 in the arm 50 and biased by a spring 78 into engagement with the hinge body 66. The pin 74 thus provides a detent by co-operation with the recesses 70, 72 that biases the hinge to one of two positions.

[0047] In use, the auxiliary lens assembly is attached to the spectacles 46 by aligning the magnets 58 and 32. The magnets provide a retaining force to hold the auxiliary lens assembly 46 on the spectacles 10. In the position shown in solid lines of FIG. 7, the auxiliary lenses 42, 44 are positioned to cover the primary lenses 12, 14 respectively and therefore provide additional protection to the user. When the protection is no longer needed, the auxiliary lens assembly 46 may be rotated relative to the arm 50 about the hinge 62.

[0048] As the auxiliary lens assembly 46 is rotated, the pin 74 is moved against the bias of the spring 78 and out of the recess 70. It then assists the continued rotation by entering into the recess 72 to hold the auxiliary lens assembly 46 in the position shown in chain dot lines in FIG. 7. During this rotation, a couple is applied to the arm 50 which is resisted by the retaining forces provided by the magnets 58, 32. The resistance to movement provided by the detent in the hinge 62 is less than the retaining force provided between the magnets 58, 32 so that the arm 50 remains in a stable position.

[0049] The stability of the arm is enhanced by the abutment between the flange 36 and the lower face of the housing 54. The radial extent of the flange and face increases the resistance to separation of the magnets 58, 32 as a couple is applied to the arm 50. The inclined flanks of the flange and face also provide radial location for the arm 50 relative to the housing 28 to resist shear forces between the magnet 58 and 32. Accordingly, a stable attachment between the auxiliary lens assembly 46 and the spectacles 10 is obtained. It will however be appreciated that where sufficient magnetic force is provided, the provision of a flange is not essential, and, where a flange is used is may be flush with the magnets rather than providing lateral location.

[0050] As shown in FIG. 9, in which like reference numerals will be used to denote like components with a suffix a added for clarity, an alternative configuration of housing 28 a and housing 54 a may be utilised. In the embodiments shown in FIG. 9, the magnet 32 a, 58 a are encompassed by the flange 36 a and the face 60 a respectively. The flange 36 a and face 60 a are planar with an annular upstanding ridge 80 provided on the flange 36 a. A corresponding recess 82 is formed in the face 60 a and the inter-engagement of the ridge 80 and recess 82 provides lateral location for the two housings but also provides a mechanical interference against tipping of the arm 50 a during movement of the auxiliary lens assembly. This further enhances the stability of the connection.

[0051] A similar arrangement is shown in FIG. 10 in which like components will be identified by like reference numerals with a suffix b added for clarity. In the embodiment of FIG. 10, the magnet 58 b projects from the end face of the housing 54 b and the magnet 32 b is recessed in the housing 28 b. Accordingly, lateral displacement between the arm 50 b and the housing 28 b is inhibited and tipping of the arm 50 b relative to the housing is also inhibited due to the mechanical interference between the inter-engagement of the magnet 58 b and the walls of the housing 28 b.

[0052] In each of the above arrangements, the exposed faces of the magnets 32, 58 are disposed normal to the plane containing the primary lenses 12, 14, i.e. they are generally horizontal when worn. In the embodiments shown in FIG. 11, the housing 28 c and 54 c are disposed such as the exposed faces of the magnets 32 c, 58 c are parallel to the plane containing the primary lenses 12, 14. Thus the arm 50 c depends downwardly behind the pedestal 22 c with the magnet 58 c facing forwardly to engage the rearwardly directed face of the magnet 32 c. As will be appreciated, the flange provided in each housing enhances the stability and, the mechanical interconnection described above with respect to FIGS. 7, 9 and 10 may also be incorporated in this arrangement.

[0053] The arm 50 d may also be arranged as shown in FIG. 12 to present the housing 54 d to the underside of the housing 28 d rather than to the top of the housing as shown in the previous embodiments. In this case, the magnet 32 d is disposed with its exposed face downwardly directed and the magnet 58 d disposed with its exposed face upwardly directed. The arm 50 d extends parallel to the frame of the auxiliary lens assembly 46 with the elbow 52 d located beneath the pedestal 22 d. Again, the magnets may be arranged to be flush with the surfaces of the housings 54 d, 28 d or may incorporate the mechanical interaction shown in FIGS. 7, 9 and 10 and described above.

[0054] In each of the above embodiments, the magnetic connection between the auxiliary frame 50 and the primary 12 is located at the temple region. In a further set of embodiments shown in FIGS. 13 through 27, an alternative arrangement is utilised in which the bridge is used to retain the auxiliary frame and accommodate the relative movement.

[0055] Referring therefore to FIG. 13, the eyeglasses 10 e are provided with a main frame 12 e with lens openings 14 e and 16 e respectively. A bridge 18 e connects the frames defining the lens openings and side arms 24 e extend rearwardly from the temple region of the primary frame 12 e.

[0056] The auxiliary frame 50 e similarly has a pair of lens opening 52 e, 54 e interconnected by a bridge 56 e. The lens opening 52 e, 54 e are defined by the main frame member 64 e.

[0057] In order to secure the auxiliary frame 50 e to the main frame 12 e, a sub frame 130 is utilised. The sub frame 130, which is best seen in FIG. 14, has a pair of arms 132, 134 projecting outwardly from a bridge member 136. The arms 132, 134 conform to the shape of an upper portion of the main frame 12 e and each terminates in a hinge for connection to the auxiliary frame 50 e.

[0058] The arm 132 terminates in a pin 138 that is received within a tubular sleeve 140 secured to the main frame 64 e of the auxiliary lenses 50 e. The arm 134 terminates in a threaded boss 142 that is aligned with a sleeve 144 secured to the main frame 64 e. A bolt 148 passes through a spring 146 and the sleeve 144 and is retained in the bush 142. The end faces of the bush 144 and sleeve 142 are contoured to provide a pair of detents, each of which holds the frame 50 e in a stable position. Thus, the auxiliary frame 50 e may pivot relative to the sub frame 130 and be retained in one of a pair of stable positions.

[0059] The bridge member 136 has a pair of magnets 150 projecting downwardly below the bridge member 136. The magnets 150 are received in a pair of sockets 152 formed in the bridge 18 e. The sockets 152 pass through the bridge member as can be seen in FIG. 15 and the bridge member 18 e is made from a magnetic material. The magnets 150 thus retain the bridge member 136 on the bridge 18 e to secure the sub frame 130 on the main frame 10 e.

[0060] In operation therefore, the sub frame 130 may be secured to the bridge 18 e with the auxiliary frame 50 e projecting upwardly as shown in FIG. 33. In this position, the auxiliary lenses 52 e, 54 e are out of the line of vision of the user and are held in a stable position. When the shade provided by the auxiliary lens is required, the auxiliary frame 50 e is rotated relative to the sub frame 130 to cause the lenses 52 e, 54 e to overlie the main lenses 14 e, 16 e. The auxiliary frame 50 e is maintained in a stable position relative to the main frame to provide the shade.

[0061] In the embodiments shown in FIGS. 14 and 15, the sockets 152 pass through the bridge 18 e. Alternatively, as shown in FIGS. 16 and 17, the sockets 152 do not pass through the bridge 18 e to provide a solid base to retain the magnet. The magnets 150 are received in the sockets 152.

[0062] In the embodiment of FIG. 16, the magnets are a square cross section but as shown in FIGS. 18 and 19 and FIGS. 20, and 21 the magnets may be an alternate cross section such as circular, as shown in those Figures.

[0063] Where the material of the bridge 18 e is not magnetic, attraction between the sub frame 130 and the bridge 18 e may be obtained by the insertion of magnets 154 at the lower end of the sockets 152. The magnets 150 thus engage the magnets 154 to retain the sub frame on the bridge. In the arrangement shown in FIGS. 22 and 23, the magnets 150 and sockets 152 are square in cross section whereas as shown in FIGS. 24 and 25, the magnets are circular in cross section.

[0064] In the above embodiments, a pair of magnets 152 have been utilised but as shown in FIGS. 26 and 27 a single magnet may be utilised. In this case, the bridge 18 e is formed from magnetic material and has a socket 152 formed centrally in the upper surface. A square section magnet 150 depends from the bridge member 136 to secure the auxiliary frame 50 e to the main frame.

[0065] In each of the above embodiments the sub frame 130 permits the pivotal movement of the auxiliary frame between the first position in which the lenses are shaded and a second position in which the auxiliary lenses are maintained out of the line of vision.

[0066] A further arrangement of hinge connection is shown in FIGS. 28 through 30. Like reference numerals will be used to denote like components with a suffix “f” added for clarity. The eyeglasses 10 f are provided with a main frame 12 f with lens openings 14 f and 16 f respectively. A bridge 18 f connects the frames defining the lens opening and side arms 24 f extend rearwardly from the temple region of the primary frame 12 f.

[0067] The auxiliary frame 50 f similarly has a pair of lens openings 52 f, 54 f interconnected by a bridge 56 f. The lens openings 52 f, 54 f are defined by the main frame member 64 f.

[0068] In order to secure the auxiliary frame 50 f to the main frame 12 f, a subframe 130 f is utilized. The subframe 130 f includes a pair of arms 160, 162 that are pivotally connected by a hinge 164. The arm 160 has a magnet 150 f projecting from the end opposite to the hinge 164 that is complimentary in shape to a socket 152 f formed in the bridge 18 f. The arm 162 is connected at its distal end to the bridge 56 f of auxiliary frame 50 f. The hinge 164 includes a pivot pin 166 that provides a frictional resistance to movement between the arms 160 and 162.

[0069] The bridge 18 f is formed from magnetic material or has a magnetic material inserted in the socket 152 f. To secure the auxiliary frame 50 f to the main frame 12 f, the arm 160 is aligned with the socket 152 f and the magnet 150 f inserted into the socket. The arm 160 is secured generally perpendicular to the bridge 18 f to support the auxiliary frame. The hinge 164 permits the auxiliary frame 50 f to be pivoted from a position in which the auxiliary lenses 52 f, 54 f overlie the primary lenses 14 f, 16 f to a position in which they are out of the field of vision. The frictional resistance provided by the hinge 164 enables the lenses to be maintained in a stable position in either configuration.

[0070] To provide an additional security for the subframe 130 f, a mechanical connection may be utilized as shown in FIG. 30. In the embodiment of FIG. 30, the lower end of the arm 160 is formed with a pair of flexible tangs 168 with outwardly directed feet 170. The feet 170 are a snug fit within the socket 152 f and thereby allow the arm 160 to be inserted into the socket 152 f and retain the arm 160 in position. Thus in the embodiment of FIGS. 28 through 30, the hinge 164 is incorporated into the subframe 130 f.

[0071] A further embodiment in which the hinge is provided between the subframe and auxiliary frame is shown in FIGS. 31 through 34. Like reference numerals will denote like components with a suffix “g” added for clarity. Eyeglasses 10 g include a main frame 12 g with lens openings 14 g, 16 g respectively. A bridge 18 g connects the frame defining the lens openings and side arms 24 g extend rearwardly from the temple region of the primary frame 12 g.

[0072] The auxiliary frame 50 g similarly has a pair of lens openings 52 g, 54 g defined by a main frame member 64 g and interconnected by a bridge wire 56 g.

[0073] In order to secure the auxiliary frame 50 g to the main frame 12 g, a subframe 130 g is utilized. The subframe 130 g has a pair of arms 132 g, 134 g interconnected by a bridge 136 g. The arms 132 g, 134 g extend parallel to one another toward the bridge 56 g on the auxiliary frame 50 g. Magnets 150 g protrude from the lower end of the arms 132 g, 134 g and are received in respective sockets 152 g formed in the bridge piece 18 g.

[0074] The opposite end of arms 132 g, 134 g terminate in a hinge arrangement 164 g best shown in FIG. 34. The distal end of the arm 132 g is formed to encompass the bridge 56 g. As can be seen from FIG. 34, the bridge wire 56 g has a square cross-section and the terminal portion of the arm 132 g is bent around the bridge wire 56 g in a complimentary shape. The arm 134 g is similarly formed about the bridge wire 56 g.

[0075] In operation, the magnets 150 g secure the subframe 130 g to the bridge 18 g. The hinge 164 g permits rotation of the auxiliary frame 50 g between a position in which the lenses 52 g, 54 g overlay the lenses 14 g, 16 g and a position in which they are out of the line of vision. The rotation is accommodated by the hinge arrangement shown in FIG. 34 with the square section of the bridge wire 56 g providing stable positions for the auxiliary frame. The forming of the leg 132 g about the bridge 56 g provides a certain degree of flexure in the hinge to accommodate the rotation of the bridge 56 g relative to the legs 132 g, 134 g.

[0076] Further retention of the legs 132 g, 134 g may also be obtained using a mechanical connection as shown in FIG. 33 similar to that shown in FIG. 30. 

1. An auxiliary lens assembly for use with a pair of spectacles having a pair of primary lenses, said assembly having a pair of auxiliary lenses interconnected to one another by a bridge, a subframe connected at one end to said auxiliary lens and having a magnetic member at an opposite end for connection to a magnetic member on said spectacle and thereby locate said assembly on said spectacles, said subframe including a hinge to permit movement of said assembly between a first position in which said auxiliary lenses cover said primary lenses to a second position in which they do not cover said primary lenses.
 2. An auxiliary lens assembly according to claim 1 wherein said hinge includes a retainer to hold said assembly in a selected one of said first or second positions.
 3. An auxiliary lens assembly according to claim 2 wherein said retainer includes a detent.
 4. An auxiliary lens assembly according to claim 1 wherein said magnetic member is secured in a housing located at one end of said arm.
 5. An auxiliary lens assembly according to claim 4 wherein said housing includes a flange at least partially encompassing said magnetic member.
 6. An auxiliary lens assembly according to claim 5 wherein said flange encompasses said magnetic member and is configured to inhibit relative movement between said arm and said spectacle.
 7. An auxiliary lens assembly according to claim 1 wherein said hinge permits pivotal movement about an axis parallel to a plane containing said auxiliary lenses.
 8. An auxiliary lens assembly according to claim 7 wherein said subframe is L shaped with an elbow intermediate its ends.
 9. An auxiliary lens assembly according to claim 8 wherein said hinge is located at one end of said subframe.
 10. An auxiliary lens assembly according to claim 9 wherein each of said auxiliary lenses is located in a frame and said subframe is connected to said frame at said hinge.
 11. An auxiliary lens assembly according to claim 1 wherein said magnetic member is a magnet.
 12. An auxiliary lens assembly according to claim 10 wherein said magnetic member is a magnet.
 13. An auxiliary lens assembly according to claim 1 wherein said subframe includes a pair of arms and said hinge interconnects adjacent ends of said arms.
 14. An auxiliary lens assembly according to claim 13 wherein one of said arms is secured to said bridge and the other of said arms is connected to said magnetic member.
 15. An auxiliary lens assembly according to claim 1 wherein said subframe includes a pair of arms having one end of each of said arms connected through said hinge to said pair of auxiliary lenses and the opposite end of each of said arms connected to one another by a bridge member, said bridge member providing for conjoint pivotal movement of said arms about said hinge.
 16. An auxiliary lens assembly according to claim 15 wherein said magnetic member is connected to said bridge member.
 17. An auxiliary lens assembly according to claim 16 wherein said arms conform to the periphery of said auxiliary lenses.
 18. An auxiliary lens assembly according to claim 17 wherein said hinge includes a detent to maintain said assembly in a selected one of said first and second positions.
 19. Eyeglasses comprising a pair of spectacles having a pair of primary lenses interconnected by a bridge and a pair of temples pivotally connected to said primary lenses for retaining said spectacles on a user, a first magnetic member located on said spectacles, an auxiliary lens assembly having a pair of auxiliary lenses interconnected to one another by a bridge, a second magnetic member secured to said auxiliary lens assembly and positioned to co-operate with said first magnetic member to retain said auxiliary lens assembly on said spectacles, a hinge between said spectacles and said auxiliary lens assembly to permit said auxiliary lens assembly to move whilst secured to said spectacles between a first position in which said primary lenses are covered by said auxiliary lenses and a second position in which said auxiliary lenses do not cover said primary lenses.
 20. Eyeglasses according to claim 19 wherein a pair of arms are provided at spaced locations, each of said arms having one of said magnetic members carried thereby for co-operation with the other of said magnetic members.
 21. Eyeglasses according to claim 20 wherein said arms are secured to said auxiliary lens assembly and said second magnetic member is located at a distal end thereof, said spectacles having corresponding spaced first magnetic members for co-operation therewith.
 22. Eyeglasses according to claim 21 wherein each of said arms includes a hinge to permit movement between said first and second positions.
 23. Eyeglasses according to claim 21 wherein each of said first magnetic members are located in a respective housing secured to said spectacles adjacent said temples.
 24. Eyeglasses according to claim 23 wherein each of said housings includes a flange at least partially encompassing said first magnetic member.
 25. Eyeglasses according to claim 24 wherein said housings support said magnetic member with a surface thereof exposed for abutment with an exposed surface of said second magnetic member carried by a respective one of said arms.
 26. Eyeglasses according to claim 25 wherein said exposed surface lies in a plane generally normal to a plane containing said primary lenses.
 27. Eyeglasses according to claim 26 wherein said exposed surface lies in a plane generally parallel to the pivotal axis defined by said hinge.
 28. Eyeglasses according to claim 25 wherein said exposed surface lies in a plane generally parallel to a plane containing said primary lenses.
 29. Eyeglasses according to claim 25 wherein said second magnetic members are located in a housing at a distal end of respective areas of said arms and each of said housings has an end face to co-operate with said flange on said spectacle.
 30. Eyeglasses according to claim 29 wherein each of said arms includes a hinge to permit movement between said first and second positions.
 31. Eyeglasses according to claim 30 wherein said hinge includes a retainer to maintain said assembly in either said first or second position.
 32. Eyeglasses according to claim 31 wherein said retainer is a detent biasing said hinge to either said first or second positions.
 33. Eyeglasses according to claim 19 wherein said auxiliary lens assembly includes a subframe incorporating said hinge and connected to said bridge of said primary frame.
 34. Eyeglasses according to claim 33 wherein said subframe is pivotally connected to said auxiliary lenses by said hinge.
 35. Eyeglasses according to claim 34 wherein said subframe includes a pair of arms each having said hinge at one end thereof and interconnected to one another for conjoint movement relative to said auxiliary lenses.
 36. Eyeglasses according to claim 35 wherein said arms conform to the periphery of said auxiliary lenses.
 37. Eyeglasses according to claim 33 wherein said subframe includes a pair of arms and a hinge interconnecting said arms.
 38. Eyeglasses comprising a primary frame and a pair of temples extending from said frame at spaced locations, and an auxiliary frame detachably secured to said primary frame by a pair of arms extending rearwardly from said auxiliary frame and secured to a housing located behind said primary frame and adjacent said temples, each of said arms including a hinge to permit said auxiliary frame to move from a first orientation in which said auxiliary frame overlies said primary frame to a second orientation in which said auxiliary frame is disposed away from the optical axis of lenses carried by said primary lens.
 39. Eyeglasses according to claim 38 wherein said arms is received in a socket in said housing.
 40. Eyeglasses according to claim 38 wherein said arms extend above said temple to engage an upper surface of said housing.
 41. Eyeglasses according to claim 38 wherein said arms extend beneath said temple and engage an underside of said housing.
 42. Eyeglasses according to claim 38 wherein said arms are secured to said housing by magnets. 